Modern Day Case: source – http://globalfreedomcenter.org/GFC/humantraffickingstories

Ukraine to USA – The Botsvynyuk brothers recruited villagers from Ukraine, promising $700-800 per month, free room and board, and transportation. Upon arriva to the USl, men and women were told they had to work without pay to cover their debt. They cleaned Wal-Mart, Target, Kmart, Safeway and other retail stores, along with homes and offices in Maryland, Delaware, Pennsylvania, New York and New Jersey. Workers said they were raped, threatened and beaten. When some escaped, their family in Ukraine were threatened with mutilation, rape, and death if the workers did not return and/or pay off their debts.

Law enforcement uncovered this case, not the companies, subcontractors, employees or patrons where they worked.

That was then, and this is now.

You can learn human trafficking/slavery indicators, and can identify and prevent it with improved policies where you work.